from The Century Dictionary and Cyclopedia

In anatomy, muciparous; secreting a glairy or viscid substance like mucus: specifically applied to synovial membranes, certain of whose fringed vascular processes were called mucilaginous glands by Clopton Havers in 1691.

Etymologies

Examples

My grandmother used to make it and I distinctly remember making my mind up to hate it before I ever tried it based entirely on the word "mucilaginous" which always occured in the same breath as "okra.".

You can read sample definitions of okra (containing the word "mucilaginous") at Dictionary. com or Hyperdictionary; there's also one without in the Wikipedia (though the word does appear later on the page in the discussion of how to cook okra).

The principle problem to overcome when making strawberry jam is their lack of pectin, which, according to Darina Allen's Ballymaloe Cookery Course, is a "mucilaginous substance" tasty that rather handily, acts a setting agent.